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I feel bad for Oki. But if he knew, I think he would be glad that he became useful. When he revealed to Sho's mom that he doesn't want to disappoint the children whose fans of his. And yet, he ended up helping those children(including Sho, a huge fan) being cured in the future! I don't think anyone could ask for more. Imagine still being a hero even when you're just a corpse!
The part were they all killed the squirrel was too cruel.😭 I guess you can't avoid what needs to be done.